NDLI: Power measurements at high voltages and low power factors

Please wait, while we are loading the content...

Year : 1930 Volume : 49

Year : 1929 Volume : 48

Year : 1928 Volume : 47

Year : 1927 Volume : 46

Year : 1926 Volume : 45

Year : 1925 Volume : 44

Year : 1924 Volume : 43

Table of contents

Current electrical articles published by other societies

Some considerations of the meetings and papers committee

Transmission at 220 kv. on the Southern California Edison system: A symposium

Section 2 — Automatic protection — Balanced relays and flashover control

Section 3A — Economic studies of transmission line design with particular reference to the mechanical features

The guided and radiated energy in wire transmission

Best lighted road

The corona as lightning arrester

Large steam turbine generators

Training course in lighting

Corona losses between wires at extra high voltages — II

Electric strain gage

Power measurements at high voltages and low power factors

Change of date of radio conference

High-voltage impregnated paper cables

America leads in electric brass melting

Theory of D-C. excited iron-core reactors and regulators

Technical committee annual reports 1923–1924

Iron and steel industry committee

Protective devices committee

Subcommittee on lightning arresters

Subcommittee on relays

Subcommittee on automatic stations

Subcommittee on current-limiting reactors

Ubcommittee on grounding of systems

Electrical machinery committee

Ducational committee

Electrophysics committee

Performance of electric brass furnaces

Discussion at Midwinter convention

Street lighting

Illumination items: Local lighting applications

Home lighting educational campaign

The Pasadena convention

Radio developments to be discussed at Philadelphia section

Meeting of the Institute of radio engineers postponed

American Engineering Council

American gas association convention October 13–17

Convention of American electric railway association

Fall meeting of American society of Civil engineers

130th Meeting of mining engineers

Future section meetings

Technical activities of A. I. E. E.

Visiting engineers from abroad

French exchange professor in engineering — 1924

Sixth session of the International commission on illumination

National Research Council

Advisory board on highway research

American engineering standards committee

Code of lighting school buildings adopted

Two new preliminary reports on standards available

Addresses wanted

Engineering Societies Library

Personal mention

The latest ideas in illumination

Engineering societies employment service

Engineering societies employment service

Past section and branch meetings

Membership - Applications, elections, transfers, etc.

Officers A.I.E.E. 1924 - 1925

A.I.E.E. committees

A.I.E.E. representative

List of sections

List of branches

Digest of current industrial news

Power measurements at high voltages and low power factors

Content Provider	IEEE Xplore Digital Library
Author	Carroll, Joseph S. Peterson, Thomas F. Stray, George R.
Copyright Year	1924
Abstract	A description is given of the apparatus for the measurement of power as low as a fraction of a watt at power factors approaching zero and voltages as high as 175 kv. to neutral. A standard make of portable wattmeter was used having maximum ranges of 1.5 watts, 37.5, 75 and 150 volts and 20 per cent power factor. To this wattmeter was adapted a three-megohm water column resistance multiplier. In the original form of the wattmeter the origins of certain errors, due to capacitances chiefly, were studied and methods for their elimination were subsequently determined. Integrity tests were developed by which the values of error powers were obtained and used as guides in making subsequent adjustments for the reduction of such errors to zero. These integrity tests were checked by using the wattmeter for the measurement of known amounts of power. Reconnaissance studies were made of the voltage-corona power loss relations for rope laid copper, 0.91-in., lock wire smooth copper, 0.91-in. and concentric strand aluminum, 1.006-in. diameter transmission line conductors in rain and fair weather at differing degrees of humidity, temperatures, and barometric pressures, from “initial” to “full” corona formation. This class of studies was extended to corona loss values as offered by a wide variation of the “surface roughness” of conductors subjected to high voltages. The losses for a single brush were measured and the shielding effect of groups of brushes was studied. Losses to single strings of insulators under different conditions were determined.
Starting Page	941
Ending Page	949
Page Count	9
File Size	3452727
File Format	PDF
ISSN	00959804
Volume Number	43
Issue Number	10
Language	English
Publisher	American Institute of Electrical Engineers
Publisher Date	1924-01-01
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Content Type	Text
Resource Type	Article

Central Library (ISO-9001:2015 Certified)
Indian Institute of Technology Kharagpur
Kharagpur, West Bengal, India | PIN - 721302

See location in the Map
03222 282435
Mail: support@ndl.gov.in

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in